What’s Vulnerable › Vulnerabilities

CVE-2021-21666

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-06-10 · updated 2026-06-17
• Weakness: CWE-79

Description

Jenkins Kiuwan Plugin 1.6.0 and earlier does not escape query parameters in an error message for a form validation endpoint, resulting in a reflected cross-site scripting (XSS) vulnerability.

Affected products

• Jenkins project Jenkins Kiuwan Plugin: through 1.6.0

References

• http://www.openwall.com/lists/oss-security/2021/06/10/14
• https://www.jenkins.io/security/advisory/2021-06-10/#SECURITY-2367
• http://www.openwall.com/lists/oss-security/2021/06/10/14
• https://www.jenkins.io/security/advisory/2021-06-10/#SECURITY-2367

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